Bahan celup kristal merah dibuat secara sintetik atau dari madder, persenyawaannya dipakai sebagai indikator.
|Preferred IUPAC name
Mordant red 11
|3D model (Jmol)||Interactive image|
|Molar mass||240.21 g·mol−1|
|Appearance||orange-red crystals or powder|
|Melting point||279 to 283 °C (534 to 541 °F; 552 to 556 K)|
|Boiling point||430 °C (806 °F; 703 K)|
|slightly to sparingly soluble|
|Safety data sheet||External MSDS|
|R-phrases||R36 R37 R38|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Alizarin or 1,2-dihydroxyanthraquinone (also known as Mordant Red 11 and Turkey Red) is an organic compound with formula C
4 that has been used throughout history as a prominent red dye, principally for dyeing textile fabrics. Historically it was derived from the roots of plants of the madder genus. In 1869, it became the first natural pigment to be duplicated synthetically.
Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as Rose madder and Alizarin crimson. Alizarin in the most common usage of the term has a deep red color, but the term is also part of the name for several related non-red dyes, such as Alizarine Cyanine Green and Alizarine Brilliant Blue. A notable use of alizarin in modern times is as a staining agent in biological research because it stains free calcium and certain calcium compounds a red or light purple color. Alizarin continues to be used commercially as a red textile dye, but to a lesser extent than 100 years ago.